TDA8596_15 Datasheet, PDF (13/48 Pages) NXP Semiconductors – I2C-bus controlled 4 ´ 45 W power amplifier with symmetrical inputs

NXP Semiconductors
TDA8596
I²C-bus controlled 4 × 45 W power amplifier with symmetrical inputs
When the SVR capacitor has discharged, the amplifier will only start-up again when the
supply voltage V_P increases above the low V_P mute threshold, typically 7.5 V. Below this
threshold, the outputs of the amplifier remain low. In I²C-bus mode, a supply voltage drop
below V_P(reset), typically 5 V will result in setting bit DB2[D7]. In this condition the amplifier
will wait for an I²C-bus command in order to start-up.
The TDA8596 prevents internally induced output pops during engine start. In order to
prevent pops on the output caused by the application (e.g. due to the tuner supply going
out of regulation), the STB pin can be pulled LOW when an engine start is detected. The
STB pin will activate the fast mute within 0.1 ms and consequently all disturbances at the
amplifier inputs will be suppressed.
V
(V)
V_P
14
V_SVR
8.4
7
V_O ⁽²⁾
V_hr ⁽¹⁾
(1) Headroom voltage V_hr = V_P − V_O.
(2) Steady state output voltage V_O = V_SVR − 1.4 V.
(3) Headroom protection threshold = V_O + 1.6 V.
Fig 7. Low-headroom protection
1.6 V
headroom protection
threshold ⁽³⁾
t (s)
001aad172
TDA8596_2
Product data sheet
Rev. 02 — 8 November 2007
© NXP B.V. 2007. All rights reserved.
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